Writing CCITT Fax Group 4 TIF format from Photoshop

X
Posted By
Xerxes
Sep 21, 2004
Views
2119
Replies
6
Status
Closed
Dear Newsgroup,

I use Photoshop CS to edit photos primarily.
However, I prefer to use it as my editing tool for all images. As such I sometimes scan documents and then use Photoshop to correct blemishes, errors, dark spots, etc. with all the great tools Photoshop has. So far no problem.
When it comes to outputting the image, as it is a black and white document, JPG is lossy and ill-suited to this type of image. TIF is perfect, except in the uncompressed format takes up too much space. Photoshop CS reads all types of TIF files including raw (uncompressed), packbits, CCITT 1D, LZW compressed, CCITT Fax Group 3, CCITT Fax Group 4, JPEG and ZIP (deflate). However, it can only save to raw (uncompressed), LZW and ZIP (deflate).
The freeware program IrfanView can read and write to all formats! I would have expected my (more expensive) Photoshop to be able to do a bit better than that especially since Adobe currently holds the copyright to the TIFF specification (curently in Version 6).

My question is:
Can Photoshop CS wriste a TIF file in the CCITT Fax Group 4 format? If no, are there any plugins for it that may be able to do so?

Thanks in advance,

Xerxes

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G
Gadgets
Sep 21, 2004
T
toby
Sep 21, 2004
"Xerxes" …
Dear Newsgroup, … I would have expected my (more expensive) Photoshop to be able to do a bit better than that especially since Adobe currently holds the copyright to the TIFF specification (curently in Version 6).

You don’t know Adobe very well, do you.

My question is:
Can Photoshop CS wriste a TIF file in the CCITT Fax Group 4 format? If no, are there any plugins for it that may be able to do so?

It’s trivial to use the tools at http://libtiff.org/ to recompress your TIFFs G4 (see, in particular, tiffcp). They’ve even been ported to Windoze.

–Toby

Thanks in advance,

Xerxes
X
Xerxes
Sep 22, 2004
I was naive, I lived in hope. I thought that the all-powerfull, all encompasing Photoshop CS could handle anything I threw at it. I was wrong. Please forgive me.

"Toby Thain" wrote in message
"Xerxes" wrote in message
news:<0TU3d.38317$>…
Dear Newsgroup, … I would have expected my (more expensive) Photoshop
to be able to
do a bit better than that especially since Adobe currently holds the copyright to the TIFF specification (curently in Version 6).

You don’t know Adobe very well, do you.

My question is:
Can Photoshop CS wriste a TIF file in the CCITT Fax Group 4 format? If
no,
are there any plugins for it that may be able to do so?

It’s trivial to use the tools at http://libtiff.org/ to recompress your TIFFs G4 (see, in particular, tiffcp). They’ve even been ported to Windoze.

–Toby
R
rain97304
Oct 22, 2004
"Xerxes" …
I was naive, I lived in hope. I thought that the all-powerfull, all encompasing Photoshop CS could handle anything I threw at it. I was wrong. Please forgive me.

"Toby Thain" wrote in message
"Xerxes" wrote in message
news:<0TU3d.38317$>…
Dear Newsgroup, … I would have expected my (more expensive) Photoshop
to be able to
do a bit better than that especially since Adobe currently holds the copyright to the TIFF specification (curently in Version 6).

You don’t know Adobe very well, do you.

My question is:
Can Photoshop CS wriste a TIF file in the CCITT Fax Group 4 format? If
no,
are there any plugins for it that may be able to do so?

It’s trivial to use the tools at http://libtiff.org/ to recompress your TIFFs G4 (see, in particular, tiffcp). They’ve even been ported to Windoze.

–Toby

Trivial; maybe, an actual solution; unfortunately not. TIFFCP complains about "Bits/sample must be 1 for Group 3/4 encoding/decoding." Bottom line: She donna work. The Utility TIFFINFO for my test file yields:

j:\My Pictures\2004-10 (Oct)>tiffinfo scan.tif
TIFF Directory at offset 0x8
Subfile Type: multi-page document (2 = 0x2)
Image Width: 841 Image Length: 120
Resolution: 300, 300 pixels/inch
Bits/Sample: 8
Compression Scheme: None
Photometric Interpretation: palette color (RGB from colormap) Image Description: "LEAD Technologies Inc. V1.01" Orientation: row 0 top, col 0 lhs
Samples/Pixel: 1
Rows/Strip: 16
Planar Configuration: single image plane
Page Number: 0-0

If anyone knows of a Photoshop plugin or other utility (other than LibTIFF), please post solution… Thx
T
toby
Oct 23, 2004
It’s trivial to use the tools at http://libtiff.org/ to recompress your TIFFs G4 (see, in particular, tiffcp). They’ve even been ported to Windoze.

–Toby

Trivial; maybe, an actual solution; unfortunately not. TIFFCP complains about "Bits/sample must be 1 for Group 3/4 encoding/decoding."

That is correct. They are inherently bilevel formats and can’t be applied to deeper images (this is not a libtiff limitation but is explicit in the TIFF spec,
http://partners.adobe.com/asn/developer/pdfs/tn/TIFF6.pdf ).

The other TIFF compression types can (LZW, PackBits etc). Why are you trying to use G3/4 on an 8-bit image?

–Toby

Bottom line: She donna work. The Utility
TIFFINFO for my test file yields:

j:\My Pictures\2004-10 (Oct)>tiffinfo scan.tif
TIFF Directory at offset 0x8
Subfile Type: multi-page document (2 = 0x2)
Image Width: 841 Image Length: 120
Resolution: 300, 300 pixels/inch
Bits/Sample: 8
Compression Scheme: None
Photometric Interpretation: palette color (RGB from colormap) Image Description: "LEAD Technologies Inc. V1.01" Orientation: row 0 top, col 0 lhs
Samples/Pixel: 1
Rows/Strip: 16
Planar Configuration: single image plane
Page Number: 0-0

If anyone knows of a Photoshop plugin or other utility (other than LibTIFF), please post solution… Thx
R
rain97304
Oct 25, 2004
(Toby Thain) wrote in message news:…
It’s trivial to use the tools at http://libtiff.org/ to recompress your TIFFs G4 (see, in particular, tiffcp). They’ve even been ported to Windoze.

–Toby

Trivial; maybe, an actual solution; unfortunately not. TIFFCP complains about "Bits/sample must be 1 for Group 3/4 encoding/decoding."

That is correct. They are inherently bilevel formats and can’t be applied to deeper images (this is not a libtiff limitation but is explicit in the TIFF spec,
http://partners.adobe.com/asn/developer/pdfs/tn/TIFF6.pdf ).
The other TIFF compression types can (LZW, PackBits etc). Why are you trying to use G3/4 on an 8-bit image?

–Toby

Bottom line: She donna work. The Utility
TIFFINFO for my test file yields:

j:\My Pictures\2004-10 (Oct)>tiffinfo scan.tif
TIFF Directory at offset 0x8
Subfile Type: multi-page document (2 = 0x2)
Image Width: 841 Image Length: 120
Resolution: 300, 300 pixels/inch
Bits/Sample: 8
Compression Scheme: None
Photometric Interpretation: palette color (RGB from colormap) Image Description: "LEAD Technologies Inc. V1.01" Orientation: row 0 top, col 0 lhs
Samples/Pixel: 1
Rows/Strip: 16
Planar Configuration: single image plane
Page Number: 0-0

If anyone knows of a Photoshop plugin or other utility (other than LibTIFF), please post solution… Thx

Toby, I’m designing a document generation platform, and the doc generation engine imposes the limitation of signatures being defined to the CCITT group 4 spec. So I have all the current Adobe tools, but I’ll be darned if I can find a way to convert to that format. So, I’m wondering why the signatures I’m working with are 8-bit… When I capture scan image (either via HP scan utilities or via PhotoShop CS), I’m requesting black and white, not grayscale. I’ll look on the capture end for now. Thanks for the reply.

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Easy-to-use drag-n-drop Photoshop scene creator with more than 2800 items.

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